On Tue, 22 Aug 2017 19:20:20 +0900
Akinobu Mita <akinobu.mita@xxxxxxxxx> wrote:
> 2017-08-20 20:05 GMT+09:00 Jonathan Cameron <jic23@xxxxxxxxxxxxxxxxxxxxx>:
> > On Sun, 23 Jul 2017 13:01:43 +0100
> > Jonathan Cameron <jic23@xxxxxxxxxx> wrote:
> >
> >> On Fri, 21 Jul 2017 00:24:27 +0900
> >> Akinobu Mita <akinobu.mita@xxxxxxxxx> wrote:
> >>
> >> > The ADS1015 device provides programmable comparator that can issue an
> >> > interrupt on the ALERT pin. This change adds the iio threshold event
> >> > support for that feature.
> >> >
> >> > The ADS1015 device only have a single config register which contains an
> >> > input multiplexer selection, comparator settings, and etc. So only a
> >> > single event channel can be enabled at a time. Also enabling both buffer
> >> > and event are prohibited for simplicity.
> >> >
> >> > Cc: Daniel Baluta <daniel.baluta@xxxxxxxxx>
> >> > Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
> >> > Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
> >> one really minor point inline.
> >>
> >> Otherwise I'm happy with this set. Just waiting to see if
> >> Daniel has time to take a look (or anyone else!)
> >>
> >
> > I added a really trivial check on the error as mentioned inline and
> > applied to the togreg branch of iio.git and pushed out as testing.
> >
> > If you could sanity check my change that would be great.
>
> I have sent version 3 of this series on 2017-07-31 that included
> a fix for the comparator polarity field setting in config register.
Sorry, I missed that for some reason when picking these up.
>
> Should I send a incremental patch for the missing part to the togreg
> branch?
Please do.
Jonathan
>
> > Thanks,
> >
> > Jonathan
> >
> >> Jonathan
> >> > ---
> >> > drivers/iio/adc/ti-ads1015.c | 406 ++++++++++++++++++++++++++++++++++++++++++-
> >> > 1 file changed, 404 insertions(+), 2 deletions(-)
> >> >
> >> > diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
> >> > index 5568be4..54547a2 100644
> >> > --- a/drivers/iio/adc/ti-ads1015.c
> >> > +++ b/drivers/iio/adc/ti-ads1015.c
> >> > @@ -17,6 +17,7 @@
> >> > #include <linux/module.h>
> >> > #include <linux/of_device.h>
> >> > #include <linux/init.h>
> >> > +#include <linux/irq.h>
> >> > #include <linux/i2c.h>
> >> > #include <linux/regmap.h>
> >> > #include <linux/pm_runtime.h>
> >> > @@ -28,6 +29,7 @@
> >> > #include <linux/iio/iio.h>
> >> > #include <linux/iio/types.h>
> >> > #include <linux/iio/sysfs.h>
> >> > +#include <linux/iio/events.h>
> >> > #include <linux/iio/buffer.h>
> >> > #include <linux/iio/triggered_buffer.h>
> >> > #include <linux/iio/trigger_consumer.h>
> >> > @@ -36,17 +38,38 @@
> >> >
> >> > #define ADS1015_CONV_REG 0x00
> >> > #define ADS1015_CFG_REG 0x01
> >> > +#define ADS1015_LO_THRESH_REG 0x02
> >> > +#define ADS1015_HI_THRESH_REG 0x03
> >> >
> >> > +#define ADS1015_CFG_COMP_QUE_SHIFT 0
> >> > +#define ADS1015_CFG_COMP_LAT_SHIFT 2
> >> > +#define ADS1015_CFG_COMP_POL_SHIFT 3
> >> > +#define ADS1015_CFG_COMP_MODE_SHIFT 4
> >> > #define ADS1015_CFG_DR_SHIFT 5
> >> > #define ADS1015_CFG_MOD_SHIFT 8
> >> > #define ADS1015_CFG_PGA_SHIFT 9
> >> > #define ADS1015_CFG_MUX_SHIFT 12
> >> >
> >> > +#define ADS1015_CFG_COMP_QUE_MASK GENMASK(1, 0)
> >> > +#define ADS1015_CFG_COMP_LAT_MASK BIT(2)
> >> > +#define ADS1015_CFG_COMP_POL_MASK BIT(2)
> >> > +#define ADS1015_CFG_COMP_MODE_MASK BIT(4)
> >> > #define ADS1015_CFG_DR_MASK GENMASK(7, 5)
> >> > #define ADS1015_CFG_MOD_MASK BIT(8)
> >> > #define ADS1015_CFG_PGA_MASK GENMASK(11, 9)
> >> > #define ADS1015_CFG_MUX_MASK GENMASK(14, 12)
> >> >
> >> > +/* Comparator queue and disable field */
> >> > +#define ADS1015_CFG_COMP_DISABLE 3
> >> > +
> >> > +/* Comparator polarity field */
> >> > +#define ADS1015_CFG_COMP_POL_LOW 0
> >> > +#define ADS1015_CFG_COMP_POL_HIGH 1
> >> > +
> >> > +/* Comparator mode field */
> >> > +#define ADS1015_CFG_COMP_MODE_TRAD 0
> >> > +#define ADS1015_CFG_COMP_MODE_WINDOW 1
> >> > +
> >> > /* device operating modes */
> >> > #define ADS1015_CONTINUOUS 0
> >> > #define ADS1015_SINGLESHOT 1
> >> > @@ -89,6 +112,30 @@ static int ads1015_fullscale_range[] = {
> >> > 6144, 4096, 2048, 1024, 512, 256, 256, 256
> >> > };
> >> >
> >> > +/*
> >> > + * Translation from COMP_QUE field value to the number of successive readings
> >> > + * exceed the threshold values before an interrupt is generated
> >> > + */
> >> > +static const int ads1015_comp_queue[] = { 1, 2, 4 };
> >> > +
> >> > +static const struct iio_event_spec ads1015_events[] = {
> >> > + {
> >> > + .type = IIO_EV_TYPE_THRESH,
> >> > + .dir = IIO_EV_DIR_RISING,
> >> > + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> >> > + BIT(IIO_EV_INFO_ENABLE),
> >> > + }, {
> >> > + .type = IIO_EV_TYPE_THRESH,
> >> > + .dir = IIO_EV_DIR_FALLING,
> >> > + .mask_separate = BIT(IIO_EV_INFO_VALUE),
> >> > + }, {
> >> > + .type = IIO_EV_TYPE_THRESH,
> >> > + .dir = IIO_EV_DIR_EITHER,
> >> > + .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
> >> > + BIT(IIO_EV_INFO_PERIOD),
> >> > + },
> >> > +};
> >> > +
> >> > #define ADS1015_V_CHAN(_chan, _addr) { \
> >> > .type = IIO_VOLTAGE, \
> >> > .indexed = 1, \
> >> > @@ -105,6 +152,8 @@ static int ads1015_fullscale_range[] = {
> >> > .shift = 4, \
> >> > .endianness = IIO_CPU, \
> >> > }, \
> >> > + .event_spec = ads1015_events, \
> >> > + .num_event_specs = ARRAY_SIZE(ads1015_events), \
> >> > .datasheet_name = "AIN"#_chan, \
> >> > }
> >> >
> >> > @@ -126,6 +175,8 @@ static int ads1015_fullscale_range[] = {
> >> > .shift = 4, \
> >> > .endianness = IIO_CPU, \
> >> > }, \
> >> > + .event_spec = ads1015_events, \
> >> > + .num_event_specs = ARRAY_SIZE(ads1015_events), \
> >> > .datasheet_name = "AIN"#_chan"-AIN"#_chan2, \
> >> > }
> >> >
> >> > @@ -144,6 +195,8 @@ static int ads1015_fullscale_range[] = {
> >> > .storagebits = 16, \
> >> > .endianness = IIO_CPU, \
> >> > }, \
> >> > + .event_spec = ads1015_events, \
> >> > + .num_event_specs = ARRAY_SIZE(ads1015_events), \
> >> > .datasheet_name = "AIN"#_chan, \
> >> > }
> >> >
> >> > @@ -164,9 +217,17 @@ static int ads1015_fullscale_range[] = {
> >> > .storagebits = 16, \
> >> > .endianness = IIO_CPU, \
> >> > }, \
> >> > + .event_spec = ads1015_events, \
> >> > + .num_event_specs = ARRAY_SIZE(ads1015_events), \
> >> > .datasheet_name = "AIN"#_chan"-AIN"#_chan2, \
> >> > }
> >> >
> >> > +struct ads1015_thresh_data {
> >> > + unsigned int comp_queue;
> >> > + int high_thresh;
> >> > + int low_thresh;
> >> > +};
> >> > +
> >> > struct ads1015_data {
> >> > struct regmap *regmap;
> >> > /*
> >> > @@ -176,6 +237,10 @@ struct ads1015_data {
> >> > struct mutex lock;
> >> > struct ads1015_channel_data channel_data[ADS1015_CHANNELS];
> >> >
> >> > + unsigned int event_channel;
> >> > + unsigned int comp_mode;
> >> > + struct ads1015_thresh_data thresh_data[ADS1015_CHANNELS];
> >> > +
> >> > unsigned int *data_rate;
> >> > /*
> >> > * Set to true when the ADC is switched to the continuous-conversion
> >> > @@ -185,15 +250,41 @@ struct ads1015_data {
> >> > bool conv_invalid;
> >> > };
> >> >
> >> > +static bool ads1015_event_channel_enabled(struct ads1015_data *data)
> >> > +{
> >> > + return (data->event_channel != ADS1015_CHANNELS);
> >> > +}
> >> > +
> >> > +static void ads1015_event_channel_enable(struct ads1015_data *data, int chan,
> >> > + int comp_mode)
> >> > +{
> >> > + WARN_ON(ads1015_event_channel_enabled(data));
> >> > +
> >> > + data->event_channel = chan;
> >> > + data->comp_mode = comp_mode;
> >> > +}
> >> > +
> >> > +static void ads1015_event_channel_disable(struct ads1015_data *data, int chan)
> >> > +{
> >> > + data->event_channel = ADS1015_CHANNELS;
> >> > +}
> >> > +
> >> > static bool ads1015_is_writeable_reg(struct device *dev, unsigned int reg)
> >> > {
> >> > - return (reg == ADS1015_CFG_REG);
> >> > + switch (reg) {
> >> > + case ADS1015_CFG_REG:
> >> > + case ADS1015_LO_THRESH_REG:
> >> > + case ADS1015_HI_THRESH_REG:
> >> > + return true;
> >> > + default:
> >> > + return false;
> >> > + }
> >> > }
> >> >
> >> > static const struct regmap_config ads1015_regmap_config = {
> >> > .reg_bits = 8,
> >> > .val_bits = 16,
> >> > - .max_register = ADS1015_CFG_REG,
> >> > + .max_register = ADS1015_HI_THRESH_REG,
> >> > .writeable_reg = ads1015_is_writeable_reg,
> >> > };
> >> >
> >> > @@ -258,6 +349,14 @@ int ads1015_get_adc_result(struct ads1015_data *data, int chan, int *val)
> >> > cfg = chan << ADS1015_CFG_MUX_SHIFT | pga << ADS1015_CFG_PGA_SHIFT |
> >> > dr << ADS1015_CFG_DR_SHIFT;
> >> >
> >> > + if (ads1015_event_channel_enabled(data)) {
> >> > + mask |= ADS1015_CFG_COMP_QUE_MASK | ADS1015_CFG_COMP_MODE_MASK;
> >> > + cfg |= data->thresh_data[chan].comp_queue <<
> >> > + ADS1015_CFG_COMP_QUE_SHIFT |
> >> > + data->comp_mode <<
> >> > + ADS1015_CFG_COMP_MODE_SHIFT;
> >> > + }
> >> > +
> >> > cfg = (old & ~mask) | (cfg & mask);
> >> >
> >> > ret = regmap_write(data->regmap, ADS1015_CFG_REG, cfg);
> >> > @@ -356,6 +455,12 @@ static int ads1015_read_raw(struct iio_dev *indio_dev,
> >> > if (ret)
> >> > break;
> >> >
> >> > + if (ads1015_event_channel_enabled(data) &&
> >> > + data->event_channel != chan->address) {
> >> > + ret = -EBUSY;
> >> > + goto release_direct;
> >> > + }
> >> > +
> >> > ret = ads1015_set_power_state(data, true);
> >> > if (ret < 0)
> >> > goto release_direct;
> >> > @@ -421,8 +526,251 @@ static int ads1015_write_raw(struct iio_dev *indio_dev,
> >> > return ret;
> >> > }
> >> >
> >> > +static int ads1015_read_event(struct iio_dev *indio_dev,
> >> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> >> > + enum iio_event_direction dir, enum iio_event_info info, int *val,
> >> > + int *val2)
> >> > +{
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > + int ret;
> >> > + unsigned int comp_queue;
> >> > + int period;
> >> > + int dr;
> >> > +
> >> > + mutex_lock(&data->lock);
> >> > +
> >> > + switch (info) {
> >> > + case IIO_EV_INFO_VALUE:
> >> > + *val = (dir == IIO_EV_DIR_RISING) ?
> >> > + data->thresh_data[chan->address].high_thresh :
> >> > + data->thresh_data[chan->address].low_thresh;
> >> > + ret = IIO_VAL_INT;
> >> > + break;
> >> > + case IIO_EV_INFO_PERIOD:
> >> > + dr = data->channel_data[chan->address].data_rate;
> >> > + comp_queue = data->thresh_data[chan->address].comp_queue;
> >> > + period = ads1015_comp_queue[comp_queue] *
> >> > + USEC_PER_SEC / data->data_rate[dr];
> >> > +
> >> > + *val = period / USEC_PER_SEC;
> >> > + *val2 = period % USEC_PER_SEC;
> >> > + ret = IIO_VAL_INT_PLUS_MICRO;
> >> > + break;
> >> > + default:
> >> > + ret = -EINVAL;
> >> > + break;
> >> > + }
> >> > +
> >> > + mutex_unlock(&data->lock);
> >> > +
> >> > + return ret;
> >> > +}
> >> > +
> >> > +static int ads1015_write_event(struct iio_dev *indio_dev,
> >> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> >> > + enum iio_event_direction dir, enum iio_event_info info, int val,
> >> > + int val2)
> >> > +{
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > + int realbits = chan->scan_type.realbits;
> >> > + int ret = 0;
> >> > + long long period;
> >> > + int i;
> >> > + int dr;
> >> > +
> >> > + mutex_lock(&data->lock);
> >> > +
> >> > + switch (info) {
> >> > + case IIO_EV_INFO_VALUE:
> >> > + if (val >= 1 << (realbits - 1) || val < -1 << (realbits - 1)) {
> >> > + ret = -EINVAL;
> >> > + break;
> >> > + }
> >> > + if (dir == IIO_EV_DIR_RISING)
> >> > + data->thresh_data[chan->address].high_thresh = val;
> >> > + else
> >> > + data->thresh_data[chan->address].low_thresh = val;
> >> > + break;
> >> > + case IIO_EV_INFO_PERIOD:
> >> > + dr = data->channel_data[chan->address].data_rate;
> >> > + period = val * USEC_PER_SEC + val2;
> >> > +
> >> > + for (i = 0; i < ARRAY_SIZE(ads1015_comp_queue) - 1; i++) {
> >> > + if (period <= ads1015_comp_queue[i] *
> >> > + USEC_PER_SEC / data->data_rate[dr])
> >> > + break;
> >> > + }
> >> > + data->thresh_data[chan->address].comp_queue = i;
> >> > + break;
> >> > + default:
> >> > + ret = -EINVAL;
> >> > + break;
> >> > + }
> >> > +
> >> > + mutex_unlock(&data->lock);
> >> > +
> >> > + return ret;
> >> > +}
> >> > +
> >> > +static int ads1015_read_event_config(struct iio_dev *indio_dev,
> >> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> >> > + enum iio_event_direction dir)
> >> > +{
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > + int ret = 0;
> >> > +
> >> > + mutex_lock(&data->lock);
> >> > + if (data->event_channel == chan->address) {
> >> > + switch (dir) {
> >> > + case IIO_EV_DIR_RISING:
> >> > + ret = 1;
> >> > + break;
> >> > + case IIO_EV_DIR_EITHER:
> >> > + ret = (data->comp_mode == ADS1015_CFG_COMP_MODE_WINDOW);
> >> > + break;
> >> > + default:
> >> > + ret = -EINVAL;
> >> > + break;
> >> > + }
> >> > + }
> >> > + mutex_unlock(&data->lock);
> >> > +
> >> > + return ret;
> >> > +}
> >> > +
> >> > +static int ads1015_enable_event_config(struct ads1015_data *data,
> >> > + const struct iio_chan_spec *chan, int comp_mode)
> >> > +{
> >> > + int low_thresh = data->thresh_data[chan->address].low_thresh;
> >> > + int high_thresh = data->thresh_data[chan->address].high_thresh;
> >> > + int ret;
> >> > + unsigned int val;
> >> > +
> >> > + if (ads1015_event_channel_enabled(data)) {
> >> > + if (data->event_channel != chan->address ||
> >> > + (data->comp_mode == ADS1015_CFG_COMP_MODE_TRAD &&
> >> > + comp_mode == ADS1015_CFG_COMP_MODE_WINDOW))
> >> > + return -EBUSY;
> >> > +
> >> > + return 0;
> >> > + }
> >> > +
> >> > + if (comp_mode == ADS1015_CFG_COMP_MODE_TRAD) {
> >> > + low_thresh = max(-1 << (chan->scan_type.realbits - 1),
> >> > + high_thresh - 1);
> >> > + }
> >> > + ret = regmap_write(data->regmap, ADS1015_LO_THRESH_REG,
> >> > + low_thresh << chan->scan_type.shift);
> >> > + if (ret)
> >> > + return ret;
> >> > +
> >> > + ret = regmap_write(data->regmap, ADS1015_HI_THRESH_REG,
> >> > + high_thresh << chan->scan_type.shift);
> >> > + if (ret)
> >> > + return ret;
> >> > +
> >> > + ret = ads1015_set_power_state(data, true);
> >> > + if (ret < 0)
> >> > + return ret;
> >> > +
> >> > + ads1015_event_channel_enable(data, chan->address, comp_mode);
> >> > +
> >> > + ret = ads1015_get_adc_result(data, chan->address, &val);
> >> > + if (ret) {
> >> > + ads1015_event_channel_disable(data, chan->address);
> >> > + ads1015_set_power_state(data, false);
> >> > + }
> >> > +
> >> > + return ret;
> >> > +}
> >> > +
> >> > +static int ads1015_disable_event_config(struct ads1015_data *data,
> >> > + const struct iio_chan_spec *chan, int comp_mode)
> >> > +{
> >> > + int ret;
> >> > +
> >> > + if (!ads1015_event_channel_enabled(data))
> >> > + return 0;
> >> > +
> >> > + if (data->event_channel != chan->address)
> >> > + return 0;
> >> > +
> >> > + if (data->comp_mode == ADS1015_CFG_COMP_MODE_TRAD &&
> >> > + comp_mode == ADS1015_CFG_COMP_MODE_WINDOW)
> >> > + return 0;
> >> > +
> >> > + ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
> >> > + ADS1015_CFG_COMP_QUE_MASK,
> >> > + ADS1015_CFG_COMP_DISABLE <<
> >> > + ADS1015_CFG_COMP_QUE_SHIFT);
> >> > + if (ret)
> >> > + return ret;
> >> > +
> >> > + ads1015_event_channel_disable(data, chan->address);
> >> > +
> >> > + return ads1015_set_power_state(data, false);
> >> > +}
> >> > +
> >> > +static int ads1015_write_event_config(struct iio_dev *indio_dev,
> >> > + const struct iio_chan_spec *chan, enum iio_event_type type,
> >> > + enum iio_event_direction dir, int state)
> >> > +{
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > + int ret;
> >> > + int comp_mode = (dir == IIO_EV_DIR_EITHER) ?
> >> > + ADS1015_CFG_COMP_MODE_WINDOW : ADS1015_CFG_COMP_MODE_TRAD;
> >> > +
> >> > + mutex_lock(&data->lock);
> >> > +
> >> > + /* Prevent from enabling both buffer and event at a time */
> >> > + ret = iio_device_claim_direct_mode(indio_dev);
> >> > + if (ret) {
> >> > + mutex_unlock(&data->lock);
> >> > + return ret;
> >> > + }
> >> > +
> >> > + if (state)
> >> > + ret = ads1015_enable_event_config(data, chan, comp_mode);
> >> > + else
> >> > + ret = ads1015_disable_event_config(data, chan, comp_mode);
> >> > +
> >> > + iio_device_release_direct_mode(indio_dev);
> >> > + mutex_unlock(&data->lock);
> >> > +
> >> > + return ret;
> >> > +}
> >> > +
> >> > +static irqreturn_t ads1015_event_handler(int irq, void *priv)
> >> > +{
> >> > + struct iio_dev *indio_dev = priv;
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > + int val;
> >> > +
> >> > + /* Clear the latched ALERT/RDY pin */
> >> > + regmap_read(data->regmap, ADS1015_CONV_REG, &val);
> >> error checking? Obviously you can't do anything much with
> >> the error, but you don't want to muddle through the rest
> >> with it.
> >> > +
> >> > + if (ads1015_event_channel_enabled(data)) {
> >> > + enum iio_event_direction dir;
> >> > + u64 code;
> >> > +
> >> > + dir = data->comp_mode == ADS1015_CFG_COMP_MODE_TRAD ?
> >> > + IIO_EV_DIR_RISING : IIO_EV_DIR_EITHER;
> >> > + code = IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, data->event_channel,
> >> > + IIO_EV_TYPE_THRESH, dir);
> >> > + iio_push_event(indio_dev, code, iio_get_time_ns(indio_dev));
> >> > + }
> >> > +
> >> > + return IRQ_HANDLED;
> >> > +}
> >> > +
> >> > static int ads1015_buffer_preenable(struct iio_dev *indio_dev)
> >> > {
> >> > + struct ads1015_data *data = iio_priv(indio_dev);
> >> > +
> >> > + /* Prevent from enabling both buffer and event at a time */
> >> > + if (ads1015_event_channel_enabled(data))
> >> > + return -EBUSY;
> >> > +
> >> > return ads1015_set_power_state(iio_priv(indio_dev), true);
> >> > }
> >> >
> >> > @@ -473,6 +821,10 @@ static const struct iio_info ads1015_info = {
> >> > .driver_module = THIS_MODULE,
> >> > .read_raw = ads1015_read_raw,
> >> > .write_raw = ads1015_write_raw,
> >> > + .read_event_value = ads1015_read_event,
> >> > + .write_event_value = ads1015_write_event,
> >> > + .read_event_config = ads1015_read_event_config,
> >> > + .write_event_config = ads1015_write_event_config,
> >> > .attrs = &ads1015_attribute_group,
> >> > };
> >> >
> >> > @@ -480,6 +832,10 @@ static const struct iio_info ads1115_info = {
> >> > .driver_module = THIS_MODULE,
> >> > .read_raw = ads1015_read_raw,
> >> > .write_raw = ads1015_write_raw,
> >> > + .read_event_value = ads1015_read_event,
> >> > + .write_event_value = ads1015_write_event,
> >> > + .read_event_config = ads1015_read_event_config,
> >> > + .write_event_config = ads1015_write_event_config,
> >> > .attrs = &ads1115_attribute_group,
> >> > };
> >> >
> >> > @@ -583,6 +939,7 @@ static int ads1015_probe(struct i2c_client *client,
> >> > struct ads1015_data *data;
> >> > int ret;
> >> > enum chip_ids chip;
> >> > + int i;
> >> >
> >> > indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
> >> > if (!indio_dev)
> >> > @@ -617,6 +974,18 @@ static int ads1015_probe(struct i2c_client *client,
> >> > break;
> >> > }
> >> >
> >> > + data->event_channel = ADS1015_CHANNELS;
> >> > + /*
> >> > + * Set default lower and upper threshold to min and max value
> >> > + * respectively.
> >> > + */
> >> > + for (i = 0; i < ADS1015_CHANNELS; i++) {
> >> > + int realbits = indio_dev->channels[i].scan_type.realbits;
> >> > +
> >> > + data->thresh_data[i].low_thresh = -1 << (realbits - 1);
> >> > + data->thresh_data[i].high_thresh = (1 << (realbits - 1)) - 1;
> >> > + }
> >> > +
> >> > /* we need to keep this ABI the same as used by hwmon ADS1015 driver */
> >> > ads1015_get_channels_config(client);
> >> >
> >> > @@ -634,6 +1003,39 @@ static int ads1015_probe(struct i2c_client *client,
> >> > return ret;
> >> > }
> >> >
> >> > + if (client->irq) {
> >> > + unsigned long irq_trig =
> >> > + irqd_get_trigger_type(irq_get_irq_data(client->irq));
> >> > + unsigned int cfg_comp_mask = ADS1015_CFG_COMP_QUE_MASK |
> >> > + ADS1015_CFG_COMP_LAT_MASK | ADS1015_CFG_COMP_POL_MASK;
> >> > + unsigned int cfg_comp =
> >> > + ADS1015_CFG_COMP_DISABLE << ADS1015_CFG_COMP_QUE_SHIFT |
> >> > + 1 << ADS1015_CFG_COMP_LAT_SHIFT;
> >> > +
> >> > + switch (irq_trig) {
> >> > + case IRQF_TRIGGER_LOW:
> >> > + cfg_comp |= ADS1015_CFG_COMP_POL_LOW;
> >> > + break;
> >> > + case IRQF_TRIGGER_HIGH:
> >> > + cfg_comp |= ADS1015_CFG_COMP_POL_HIGH;
> >> > + break;
> >> > + default:
> >> > + return -EINVAL;
> >> > + }
> >> > +
> >> > + ret = regmap_update_bits(data->regmap, ADS1015_CFG_REG,
> >> > + cfg_comp_mask, cfg_comp);
> >> > + if (ret)
> >> > + return ret;
> >> > +
> >> > + ret = devm_request_threaded_irq(&client->dev, client->irq,
> >> > + NULL, ads1015_event_handler,
> >> > + irq_trig | IRQF_ONESHOT,
> >> > + client->name, indio_dev);
> >> > + if (ret)
> >> > + return ret;
> >> > + }
> >> > +
> >> > ret = ads1015_set_conv_mode(data, ADS1015_CONTINUOUS);
> >> > if (ret)
> >> > return ret;
> >>
> >> --
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> >
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